diff --git a/src/shared/data/entityWrites.ts b/src/shared/data/entityWrites.ts
index caa606d..1556e79 100644
--- a/src/shared/data/entityWrites.ts
+++ b/src/shared/data/entityWrites.ts
@@ -94,13 +94,12 @@ export async function updateEntityField(
   const s = assertNuri(subject);
   const pred = `${FP}${field}`;
   const obj = renderTerm(term);
-  // NO explicit `GRAPH <${graphNuri}>` wrapper: anchored to `graphNuri`, both the
-  // DELETE and the INSERT target that repo's DEFAULT graph — the exact graph the
-  // anchored default-graph READ queries (read-model.ts readDoc). An explicit
-  // `GRAPH <plainNuri>` body writes into a NAMED graph the anchored read never
-  // sees, so the mutation would not round-trip (same fix as writeEntity / the
-  // lib's inbox.post). `assertNuri(graphNuri)` is still done implicitly by
-  // `docs.sparqlUpdate`'s anchor handling — validate `subject` here as it lands
+  // NO explicit `GRAPH <…>` wrapper: anchored to `graphNuri`, both the DELETE and
+  // the INSERT target that doc's anchored DEFAULT graph — the exact graph the
+  // anchored read queries. This no-GRAPH default-graph form is the CANONICAL SDK
+  // write shape (same as writeEntity / registration.ts); SDK graph details live in
+  // `@ng-eventually/client`, not here. `assertNuri(graphNuri)` is done implicitly
+  // by `docs.sparqlUpdate`'s anchor handling — validate `subject` here as it lands
   // in an IRI position.
   const del = `DELETE WHERE { <${s}> <${pred}> ?o }`;
   await docs.sparqlUpdate(sid, del, graphNuri);
@@ -134,13 +133,11 @@ export async function writeEntity(
     if (obj === null) continue;
     triples.push(`<${FP}${field}> ${obj}`);
   }
-  // NO explicit `GRAPH <${g}>` wrapper: anchored to `graphNuri`, the write lands in
-  // that repo's DEFAULT graph — the exact graph the anchored default-graph READ
-  // queries (read-model.ts readDoc). An explicit `GRAPH <plainNuri>` body instead
-  // writes into a NAMED graph distinct from the repo's default graph, which the
-  // anchored default-graph read never sees (the old anchorless `GRAPH ?g` scan did,
-  // which is why it worked before the read switched to per-doc anchored). Same shape
-  // as the lib's inbox.post / entity writes: anchor scopes the write, no GRAPH clause.
+  // NO explicit `GRAPH <…>` wrapper: anchored to `graphNuri`, the write lands in
+  // that doc's anchored DEFAULT graph — the exact graph the anchored read queries.
+  // This is the CANONICAL SDK write shape (anchor scopes the write, no GRAPH clause;
+  // same as updateEntityField / registration.ts); SDK graph details live in
+  // `@ng-eventually/client`, not here.
   const update = `
     INSERT DATA {
       <${assertNuri(subject)}> ${triples.join(' ;\n        ')} .
diff --git a/src/shared/data/registration.ts b/src/shared/data/registration.ts
index c4d95c8..f8dbfd5 100644
--- a/src/shared/data/registration.ts
+++ b/src/shared/data/registration.ts
@@ -331,12 +331,11 @@ async function countParticipations(
 ): Promise<number> {
   const evL = escapeLiteral(eventId);
   const usL = escapeLiteral(userId);
-  // NO explicit `GRAPH <${graphNuri}>` wrapper: participations are written by
-  // `writeEntity` into the anchored DEFAULT graph (one doc per entity), so this
-  // count MUST read that same default graph — anchored to `graphNuri`, with no
-  // `GRAPH` clause. An explicit `GRAPH <plainNuri>` body reads a NAMED graph the
-  // writes never land in → always 0 (the graph-mismatch bug — same fix as
-  // writeEntity/updateEntityField and the lib's read-model/inbox).
+  // NO explicit `GRAPH <…>` wrapper: participations are written by `writeEntity`
+  // into the anchored DEFAULT graph (one doc per entity), so this count reads that
+  // same anchored default graph — anchored to `graphNuri`, no `GRAPH` clause. This
+  // is the CANONICAL SDK read/write shape (write and read the same anchored default
+  // graph); SDK graph details live in `@ng-eventually/client`, not here.
   const query = `
     SELECT (COUNT(DISTINCT ?s) AS ?n) WHERE {
       ?s a <${P.partType}> ;
@@ -420,12 +419,12 @@ export async function deleteParticipation(
   const usIri = escapeIri(userId);
   const evL = escapeLiteral(eventId);
   const usL = escapeLiteral(userId);
-  // NO explicit `GRAPH <${graphNuri}>` wrapper: participations live in the
-  // anchored DEFAULT graph (writeEntity), so the sweep must DELETE from that same
-  // default graph — anchored to `graphNuri`, no `GRAPH` clause. Deleting from an
-  // explicit `GRAPH <plainNuri>` named graph would no-op (the triples aren't
-  // there), silently leaving the participation → the F2 resurrection. Same fix as
-  // countParticipations / writeEntity.
+  // NO explicit `GRAPH <…>` wrapper: participations live in the anchored DEFAULT
+  // graph (writeEntity), so the sweep DELETEs from that same anchored default
+  // graph — anchored to `graphNuri`, no `GRAPH` clause. Write, read and delete all
+  // use the one CANONICAL anchored-default-graph shape so they stay consistent (a
+  // mismatched target here would no-op the delete → the F2 resurrection). SDK graph
+  // details live in `@ng-eventually/client`, not here.
   const sweep = `
     DELETE { ?s ?p ?o }
     WHERE {
@@ -478,11 +477,10 @@ export async function insertNotification(
   const payloadTriple = notif.payload
     ? `\n      <${P.payload}> "${escapeLiteral(notif.payload)}" ;`
     : '';
-  // NO explicit `GRAPH <${graphNuri}>` wrapper: anchored to `graphNuri`, the
-  // INSERT lands in that repo's DEFAULT graph — consistent with every other
-  // per-entity write (writeEntity / updateEntity / the lib's inbox.post). An
-  // explicit `GRAPH <plainNuri>` body targets a phantom named graph that no
-  // anchored default-graph read ever sees (graph-mismatch bug).
+  // NO explicit `GRAPH <…>` wrapper: anchored to `graphNuri`, the INSERT lands in
+  // that doc's anchored DEFAULT graph — the CANONICAL SDK write shape, consistent
+  // with every other per-entity write (writeEntity / updateEntityField). SDK graph
+  // details live in `@ng-eventually/client`, not here.
   const update = `
     INSERT DATA {
       <${assertNuri(subject)}> a <${NOTIF_TYPE_IRI}> ;